lapsley



Nov. 21, 1939.-

R. LAPSLEY TRANSMISSIQN' Original Filed Jan. 31. 1931 2 Sheets-Sheet 1 R. LAPSLEY TRAflSMI-SSION Nov. 21, 1939.

Original Filed Jan. 51, 1931 2 Sheets-Sheet 2 Reissued Nov. 21, 1939 UNITED STATES PATENT OFFICE to Clark Equipment Company, Mich, a corporation of Michigan Buchanan,

Original No. 1,992,898, dated February 26, 1935. Serial No.- 512,596, January 31,1931. Application for reissue October 16, 1936, Serial No.

The present invention relates generally to antomobile transmissions, and more particularly to invention will be apparent to those skilled in the art after a consideration 'of the following detailed description of the preferred structural embodiment, taken in conunctionwith the accompanying drawings, in which:

Figure l is a vertical cross-sectional view through a transmission embodying the principles of the present invention.

Figure 2 is an enlarged cross-section taken substantially along the line 2-2 of Figure 1;

Figure 3 is an enlarged cross-section taken substantially along the line 3-3 of Figure 1; and

Figure 4 is a perspective illustrating the method of mounting of these parts and the means holding one of the helical gears in place on the driven shaft.

In the drawings, the reference numeral l indicates in its entirety the housing. of the transmission. The housing i carries a cover plate 2 having the pedestal 3 in which is mounted the usual gear shift lever, the lower end of which is indicated by the reference numeral 4, and the associated shift rods 8, i and I carrying the shift forks iii, II and II in the usual and well known manner. The forward web l5 of the transmission housing I carries a bearing cap IS in which is journaled the driving shaft I! which is adapted to be connected at its forward end to the clutch of an automobile motor (not shown). The rear end of the driving shaft 11 carries or has formed integrally therewith a driving gear 211 which'is provided with a pair of axial concentric bores 22 and 23 the purpose of which will be described later.

The driving gear 20 is journaled in the transmission housing I by means of ball bearings 25 having an inner race 26 secured to the driving gear 20 and an outer race 21 mounted in .the forward web I5 of the transmission housing.

A tubular secondary or countershaft 30 is jour- 20' Claims. (CL 74-333) naled in the lowerpart of the transmission housing'. For this purpose the housing carries a fixed shaft 3| carrying a roller bearing structure 32 upon which the rear end of the tubular countershaft 30 is supported. The forward end 33 of.

the fixed shaft 3| is reduced and threaded, there being a shoulder 34 between the forward and the rear portions of the fixed shaft. A nut .35 is adapted to be threaded onto the reduced end 33 of the fixed shaft and to effectively secure the shaft in position in the transmission housing. The forward end of the tubular countershaft ll carries a helical driven'gear It which is arranged to be in constant mesh with and driven by the driving gear 28 which also is a helical gear and is formed with an extended hub portion 4| having a bore receiving the forward end oi the countershaft 30 to which the hub M of the driven gear is fixedly secured as by a key or other means.

The driven gear 40 is formed with an axial recess which receives the outer race 43 of the bearing means supporting the driven gear id and v the forward end of the tubular countershaft. This bearing means comprises a plurality of antifriction elements in the form of bulk 85 operatingbetween the outer race 43 and an inner race 46. The latter is mounted on a flanged washer is, one end of which abuts against the shoulder 3 on the fixed shaft while the flange 49 thereof abuts against the inner race 45 so that when the nut 35 is tightened the bearing means for the driven shaft Iii is effectively. clamped and secured in place in the transmission housing i against the forward web IS. In order to better position these parts the web 55 is provided with an annular boss 50 to receive the inner race 4! thereagainst. The outer race 43 is held in place in the driven gear 40 by a spring 62 snapped into a suitably formed groove in the driven gear I. The driven gear and the bearing means just described are so arranged that any forward thrust transmitted to'the driven gear is resisted by the balls 15, and the outer and inner races 43 and 48.

A driven shaft it is journaled for rotation in the transmission housing I. This shaft comprises splined portions and B2 of different diameters,

. there being a circumferential and forwardly facing shoulder 53 between these two portions. The

forwardmost end 68 of the driven shaft 60 is reduced and is suitably supported by bearings it in the axial bore 23 formed in the driving gear 20. As shown in Figure 1 this bearing means comprises a plurality of rollers. The'rear end of the the usual manner.

driven shaft 88 is supportedin the housing I by bearing means 18 arranged to'take bot... axial and radial thrust, the same as the bearing means 45 for the driven gear and the countershaft. The bearing means 18 comprises a plurality of balls mounted between a fixed outer race 1! and an inner race 12 secured to the driven shaft 88 in A spring ring 18 holds the outer race 1| in proper position in the rear wall of the transmission housing I.

The tubular countershaft or secondary shaft 38 carries a helical gear 88 suitably keyed thereto and a pair of smaller gears 82 and 83, the latter being preferably formed integrally with the countershaft 38 but may be separate parts keyed or otherwise secured to the countershaft if desired. The helical gear 88 is in constant mesh with a corresponding helical gear journaled on the driven shaft 88. This gear is provided with an inwardly extending radial flange 88 received against the abutment shoulder 83 whereby the gear 85 is prevented from moving rearwardly. The gear 85 is mounted on a bushing 88 having, a smooth exterior surface to form a bearing support for the gear 85 and a pluralityof teeth 88 adapted to be received between the splines on the portion 82 of the driven shaft 88. As best shown in Figure 2 one or more teeth 88 are omitted so that there are spaces or openings 88 between certain splines so that lubricant may find its way between the bushing 88 and the driven shaft 88. The gear member 85 is provided with an interior circumferential groove 82 and the bushing 88 is provided with one or more openings 94 so that the lubricant may flow in through the spaces 88 and the openings '84 into the groove 82.

The rearend of the bushing or bearing member 88 contacts with the flange 88 and holds the.

same against the shoulder 83 on the driven shaft 88. The bushing 88 is itself held in position by a toothed ring or washer 81, best shown in Figures 3 and 4. As shown in these figures, the washer 81 v is provided with a plurality of teeth 98 which are spaced to correspond to the splines 88 on the smaller splined portion of the driven shaft 88. The splines 88 are interrupted adjacent the forward edge or end of the bushing 88 so as to form in effect a circumferential groove I88 on the driven shaft.

When assembling the gear 85 and the bushing 88 on the driven shaft 88 the gear 85 is first slipped over the forward end of the driven shaft and brought in position thereon with its flange 88 in abutting engagement with the shoulder 83.

Next the bushing 88 is slipped onto the smaller splined portion82 of the driven shaft 88 with the teeth thereof positioned as indicated in Figure 2.

Lastly the toothed washer 81 is passed over the forward end of the shaft 88, as indicated in Figure 4, and then when it reaches the groove I88 the washer is given a slight turn to bring the teeth 88 thereof in the groove I88 and behind the splines 88, as best shown in Figure 3. The driven shaft 88 is provided with a radial bore I85 in which is mounted a pin or plunger I88 which is normally urged outwardly by a spring I81 seated in the bore I85. When the washer or ring 81 is turned to the position shown in Figure 3 the spring pressed plunger or pin I88 moves outwardly and occupies a position between adjacent teeth on the ring or washer 81 so as to effectively hold or lock the washer and the associated bushing 88 in place. If necessaryfthe bushing 88. may be provided with a small recess or relief I88 to accommodate the spring pressed plunger I88. The bushing 88 may be removed to permit the removal of the gear 85 by depressing the plunger I88 with a suitable tool and rotating the toothed washer 81 back to the position shown in Figure 4.

A sliding clutch dog or hub H5 is mounted on the splined portion 82 of the driven shaft 88 and is provided with two sets of teeth H8 and H1 which are adapted to engage, respectively, with teeth I28-formed on the interior of the axial bore or recess 22 of the driving gear 28 and with teeth I2I formed interiorly of the forward hub I22 on the floating gear 85; A shifter groove I25 on the driving hub H5 is embraced by the arms of the shift fork II.

A pair of gears I28 and I28 are mounted .on the larger splined portion 8| of the driving gear 88 and each have grooved hubs I3l and I32 engaged respectively by the shift forks I8 and I2. The gear I28 is adapted to be shifted forwardly to engage the gear 82 on the countershaft 38 and to be moved rearwardly to engage the idler or reverse gear I35 journaled on an idler shaft I38 supported in the transmission housing I. The gear I28 is adapted to be shifted forwardly to engage with the gear 83 on the countershaft 38.v

48 to the countershaft 38 and through gear 83 to the gear I28 splined on and driving the driven shaft 88. For second speed the shift rod 8 is actuated to move the gear I28 forwardly into engagement with the gear 82, and for third-speed the shift rod 1 is actuated to move the sliding dog or clutch hub II5 rearwardly so that the teeth II1 engage the teeth I 2| on the gear 85. With this arrangement the drive is transmitted from the driving shaft I1 through the driving gear 28 and the driven gear 48 to the countershaft 38. which drives thehelical gear 88 and the helical gear 85, these gears being constantly in mesh. The gear 85 is freely rotatable on the driven shaft 88 but when the clutch dog H5 is moved rear-V ment shoulder 83 on the driven shaft 88 by the bushing Gland washer 81, it will be observed that any forward thrust of the gear will be transmitted by the bushing 88 and the washer 81 to the driven shaft 88 and its bearing 18-12 in the rear of the housing and that rearward axial thrust of the gear 85 will be transmitted directly to the driven shaft and to its bearing 18-12 in the transmlssion housing without going through the bushing 88 or bearing means by which the gear is rotatably held on the driven shaft 88. The corresponding thrust of the gear 88 which is keyed onto the tubular countershaft 38 is transmitted by the countershaft directly forward to its bearing means 45 at the forward end of the transmission. The thrust of gear 28 is taken care of by its bearing 2521. In this way the driving strains in the transmission are effectively resisted by parts which are best constructed to withstand them.

For-fourth speed or direct drive the sliding clutch hub II! is shifted forwardly on the splines ll until the teeth 6 engage the teeth I20 on the driving gear Ill. When so engaged the driven shaft II is connected directly with the driving shaft II. For reverse, the gear I28 is shifted rearwardly until the teeth thereof engage the outer or reverse pinions I35 in the usual manner.

Due to the spaces 90 around the splined portion II and the one or more openings 94 the bearing of the floating gear 85 on the driven shaft Bl is adequately lubricated.

While I have shown and described in detail the preferred structural embodiment of the present invention it is to be understood that the principles of my invention can be employed in means which is widely different from that shown in the drawings.

What I claim, therefore, and desire to secure by Letters Patent is:

1. In a transmission comprising a housing, and a driven shaft iournaled therein, said driven shaft having a splined end and abutment means thereon, a gear mounted on the splined portion and having a flange received against said abutment means, a bushing on the said splined portion and engaging the flange of said gear, said bushing providing a journal support for the gear, and means securing the bushing in place on the driven shaft.

2, In a transmission comprising a driving shaft,

a driven shaft, :2 countershaft, and gear means connecting the driving shaft and a countershaft, the driven shaft having a splined reduced portion and an abutment shoulder between the splined portion and the portion of larger diameter, a bushing carried in said splined portion adjacent the shoulder, gear means connecting the driven shaft and the countershaft and including agear journaled on said bushing, and locking means for holding said gear in position on the bushing and against said shoulder.

3. In atransmission comprising a driving shaft, a driven shaft, a countershaft, and gear means connecting the driving shaft and the countershaft, the driven shaft having a spiined reduced portion and an abutment shoulder between the splined portion and the portion of larger diameter, a bushing carried by said splined portion adjacent the shoulder, gear means'connecting the driven shaft and the countershaft and including a gear having an internal groove journaled on said bushing, and ports formed in the bushing to provide communication betweenthe space between the splines on said reduced driven shaft portion and the internal groove in said gear for lubricating said gear and bushing.

4. In a transmission including a housing, and a driven shaft iournaled therein and having one portion of larger diameter than the other, there being a shoulder therebetween, a gear adapted to be mounted on said shaft and'having an inwardly extending radial flange, bearingmeans adapted to he slipped onto the driven shaft and receive the gear and to contact with the flange to hold it against said shoulder, and means to hold the bearing means in position on the shaft whereby the gear is journaled for free rotation on the shaft but prevented from moving axially thereof.

5. In a transmission including a housing, and.

a driven shaft journaled therein and having one portion of larger diameter than the other, there being a shoulder therebetween and the portion of smaller diameter being splined, a gear adapted to be mounted on said shaft and having an inwardly extending radial flange, bearing means adapted to be slipped onto the splined portion of the driven shaft and receive the gear and to contact with the'flange to hold it against said shoulder, the bearing means comprising abushing having interior splines cooperating with the splined portion of the driven shaft, the splines of the bushing being interrupted and the bushing being apertured to provide for lubricating 'the gear and bushing, means to hold the bushing in position on said shaft, comprising a toothedwasher adapted to be mounted on the splined portion of the driven shaft against the bushing, the splines of the shaft being'interrupted to permit the washer being turned to bring the teeth thereof in contact with the ends of said splines, and means to retain the washer in position with the teeth behind the splines.

6. In a transmission comprising a housing, and

vengaging said abutment means, and means mounted on the smaller splined portion of the driven shaft for rotatably supporting the gear in position against said abutment means.

8%. In a transmission, a shaft having a radially disposed abutment means, a gear member mounted for rotation on said shaft and reacting at one end against said abutment means, whereby the gear member is restrained against axial movement in one direction, a groove formed in said shaft at the other end of said gear member and spaced from said abutment means, a ring carried in said groove against said other end of the gear member and reacting against said shaft for holding said gear member in position, a clutch section having a set of radially extending clutch teeth carried at the other end of said gear memher and overhanging and spaced radially outwardly of said ring, and a shiftable clutch memher in driving engagement with said shaft and movable toward said ring, said clutch member having radially disposed teethadapted to engage said overhanging teeth on said gear-carried clutch section and said abutment means taking the reaction when said clutch member comes into engagement with said clutch section.

9. In a transmission, a driven shaft having a splined section, means on the driven shaft providing a radially extending shoulder, a driven gear mounted for rotation on said driven shaft and held at one end against axial displacement in one direction by said shoulder, an annular groove formed adjacent the other end of said driven gear in the splined portion of the driven shaft, :1 ring disposed in the groove at said other end of the driven gear, means cooperating with said ring so as to hold said driven gear against axial displacement in the other direction, a clutch hub section on said driven gear extending axially from said other end thereof and embracing said groove and ring, radially inwardly directed clutch teeth carried on said hub section, and a clutch member slidable on said splined shaft section and having a set of exterior clutch teeth adapted to be moved toward said ring and groove to engage the clutch teeth on said clutch hub section, said shoulder taking the reaction of said gear when said clutch member moves into engagement therewith.

10. In a transmission, a shaft having a radially disposed abutment means, a gear member mount ed for rotation on said shaft with one end disposed up against and in contact with said abutment means, a groove formed in said shaft at the other end of said gear member and spaced from said abutment means, a ring carried in said groove against said other end of the gear member, and means reacting against said shaft for holding said ring in position and accessible; for disassembly when in ring-holding relation.

11. In a transmission comprising a housing and a splined shaft journaledtherein, said shaft having means serving as abutment means formed integrally on the shaft, a gear mounted on said shaft and having one end received against said abutment means. a groove formed in said shaft adjacent the other end of said gear opposite said abutment means and exposing end portions of said splines, a ring disposed in said groove against said end portions of the splines and serving to hold said gear in contact with said abutment means, and means disposed between certain of said splines and, engaging said ring for holding the gear in position and accessible at one side of the ring when engaging the latter.

12. In a transmission comprising a housing and a splined shaft journaled therein. said shaft having a reduced portion so that the ends of the splines adjacent one end of the reduced section serve as abutment means formed integrally on the shaft. a gear mounted on saidshaft and having one end received against said abutment means, a ring member at the end of said gear opposite said abutment means for holding said gear up against the abutment means. and means separate from the ring and normally held against rotating movement with respect to said shaft for holding the ring in position, said means being disposed axially of the shaft outwardly of said ring so as to be accessible to provide for releasing said ring and gear when desired.

13. In a transmission including a housing and a driven shaft journaled therein and having one portion of larger diameter than the other, there being a shoulder therebetween, a gear adapted to be mounted on said shaft and having an inwardly extending radial flange adapted to be dis.- posed with its outer face against said shoulder, bearing means adapted to be slipped onto the driven shaft substantially against the inner face of said flange and to receive and support the gear, and means to hold the bearing means in position on the shaft and prevent said gear from .moving axially away from said shoulder thereof.

14. In a transmission comprising a housing and a shaft journaled therein, said shaft. having means serving as abutment means formed integrally on the shaft, a gear mounted on said shaft and having an inwardly directed flange at one end with its outer face received against said abutment means, bearing means on said shaft at the inner side of the flange opposite said abutment means and providing a journal support for the gear on said shaft, and means for holding said gear and bearing means in proper position on said shaft.

15. In a transmission comprising a housing and a splined shaft journaled therein, said shaft hav ing means serving as abutment means formed integrally on the shaft, a gear mounted on said shaft and having an inwardly directed flange at one end received against said abutment means, bearing means on said shaft at the side of the flange opposite said abutment means and providing a journal support for the gear on said shaft, there being a groove in said shaft adjacent the end of the gear opposite said abutment means, a ring seated in said groove for holding said gear and bearing means in proper position on said shaft, and means for retaining said ring in interlocked relation with respect to the splines of said shaft and holding. said ring in said groove.

16. In a transmission, shaft having a radially disposed abutment means, a gear member mounted for rotation on said shaft and reacting at one end against said abutment means, whereby the ring carried in said groove and reacting against said shaft for holding said journal means in position and said gear member up against said abutment means, a clutch section carried at said other end of said gear member and including a set of radially extending clutch teeth overhanging and spaced radially outwardly of said ring, and a shiftable clutch member in driving engagement with said shaft and movable toward said ring, said clutch member having radially disposed teeth adapted to engage said overhanging teeth of said clutch section, said abutment means taking the reaction when said clutch member comes into engagement with said clutch section and said ring taking the reaction when said clutch member is disengaged from said gear-carried clutch section.

17. In a transmission, a shaft having a radially disposed abutment means, a gear member'mounted for rotation on said shaft and reacting at one end against said abutment means, whereby the gear member is restrained against axial movement in one direction, a groove formed in said shaft at the other end of said gear member and spaced fromsaid abutment means, means acting as a journal support for said gear member for holding the latter against said abutment means for restraining axial movement of said gear member in the other direction, a ring carried in said groove and reacting against said shaft for holding said journal support means in position, a clutch section carried at said other end of said gear member and-including a set of radially extending clutch teeth overhanging and spaced radially, outwardly of saidring and the adjacent end of said journal support means, and a shiftable clutch member in driving engagement with said'shaft and movable toward said ring, said clutch member having radially disposed teeth sieve.

having an end received against said abutment means and an axially directed toothed clutch section atthe other end, a ring carried in said groove and reacting against said shaft for holding said gear in place against said abutment meens, said clutch section extending axially of and overhanging said ring, and a splined shii'tehie clutch member carried to:- axial movement on said spliced port-ion andmovable toward said gear for clutching the latter to said strait, said abutment means taking the reaction when said clutch member comes into engagement with said clutch section and said ring acting to take the reaction when said clutch member is disengaged from saidclutch section.

gear, a. ring carried in said groove and reacting against said shaft for holding said bushing in place, said bushing serving as a journal support for the gear-and holding the flange of the latter against said abutment means, said clutch section extending axially of and overhanging said ring and the adjacent end of said bushing, and a shiftable clutch member carried i'or axial movement on said splined portion and movable toward said gear ior clutching the latter to said shaft, said abutment means taking the reaction when said clutch member comes into engagement with said clutch section and said ring acting through said hashing to take the reaction when said clutch member is disengaged from said clutch section.

so. In a transmission, a driven shaft having a splined section, means on the driven short providing a radially extending shoulder, a. driven gear mounted for rotation on said driven shaft end held at one end against axial displacement in one direction by said shoulder, an annular hub section, a clutch member slidable on said spllned shaft section and having a setof exterior clutch teeth, and means to shift said slidable" clutch member in one direction toward said ring to engage the clutch teeth on said clutch section and in the other direction out of engagement therewith, said shoulder on the driven shaft taking the reaction when said clutch member is encaged with said clutch section and said ring taking the reaction when said shiftable clutch memher is disengaged from said'clutch section.

ROBERT LAPSLEY. 

